How it's done

I create these rugs with the help of Allgauer weaving loom (Allgauer Webrahmen).

I firstly warp the loom vertically with a low stretch yarn (mixture of cotton and polyester or linen work well). This is how I warp the loom:

In this other weaving, for example, I pull the shuttles with yarns of different colors under and over the vertical threads to create the diamond pattern below.

I beat down the weaving with a comb.

The rotating heddle bar helps to raise every other vertical thread.